ExpandaCom Flat Pack Modular Building, 20ft Stackable Office Cabin.

All New ExpandacomExpandacom is a fully hand portable flat pack modular office building system.

The ExpandaCom flat pack modular office building is the only totally hand portable 20ft flat pack stackable office building available in the UK.

It is easy and quick to assemble by hand without the need for cranes or specialist tools or equipment. The flat pack building can be assembled without prior training using only a socket set/spanners and a screwdriver.

The unique prefabricated design of the ExpandaCom flat pack modular office building provides a simple solution to providing office accommodation in difficult to access and inaccessible areas as all the components can be carried by hand and the unit constructed where it is needed.

Key features that make the ExpandaCom flat pack modular building the first choice for the construction industry, schools and local authorities include:

  • Flat packed and totally hand portable
  • Quick and easy to assemble
  • High quality with robust but lightweight construction
  • Demountable for easy re-relocation
  • Ideal for inaccessible areas
  • No cranes or specialist equipment needed
  • Can be stacked or linked to make larger areas
  • A wide range of accessories available

If you require high quality, office accommodation of robust construction that is lightweight enough to be carried by and located even in the most inaccessible areas, quickly and easily assembled by untrained operatives without recourse to specialist tools and equipment then the ExpandaCom flat pack modular building is the solution for you.

Flat pack stackable office building

Individual 20ft units can be stacked two high by using the optional stacking kit, the only flat pack stackable office building in the UK today.

The ExpandaCom flat pack modular building comes with 1 x door panel and 2 x window panels as standard.  These panels can be placed anywhere within the frame in order to design different configurations.  Additional windows/doors can be placed within the structure.

Now with improved security features, stronger wall panels and die cast rounded roof corners.

ExpandaCom Flat-Pack Modular Building features:

  • Size: 6.14m x 2.3m
  • Durable protective powder coated finish: RAL 9002 off-white (interior & exterior).
  • Fully insulated sandwich panel wall and roof
  • Vinyl floor covering
  • 2No Double glazed windows that can be positioned as required during assembly / construction
  • 1No Steel door that can be positioned as required during assembly / construction

ExpandaCom Flat Pack Modular Building Options:

window-security-guard optional electric pack expandacom02 expandacom03

Linked Expandacom flat pack modular buildings

  • Stacking/lifting kit – to lift and stack units on top of each other
  • Electric pack – includes, switches, sockets, trunking, consumer units and everything you need to complete installation
  • Heavy duty window grills
  • Long side linking kit to kit to extend your building in width
  • End-to-end linking kit to expand your building in length
  • Additional window and door panels

ExpandaCom Flat Pack Office Technical Details


Length: 6,204mm / Width: 2,309mm (with gutter 2,391mm) / Height: 2590mm, Weight: 1,286kg


The prefabricated Expandacom is an insulated closed volume demountable accommodation unit, designed for use in very restricted areas above and below ground. Assembly is simple, and is achieved by mounting the sandwich panels and components into the steel frame and chassis, requiring only manpower.

The unit comes with 1 x door panel and 2 x window panels as standard. These panels can be placed anywhere within the frame in order to design different configurations. Additional windows/doors can be placed within the structure.


Chassis (complete) 523kg

Chassis (per section) 82kg

Blank wall panel 17kg

Window panel 40kg

Door panel 55kg

Inner roof panel 15kg

Outer roof panel (complete) 204kg

Outer roof panel (per section) 80kg

Total assembled weight 1,286kg


50mm sandwich panels consisting of two 0.60mm powder coated galvanized steel sheets with 50mm high density (16 kg/m3) polystyrene insulation. Colour: Off-white (RAL 9002).


Ceiling supporting frame consists of a rigid and torsion resistant cold formed 1.50 mm supporting frame, (retention bars) powder coated in off-white (RAL 9002) which locate into spiggots in the four corners of the 3mm corner posts. The outer roof skin is in two parts, and consists of 0.60mm box profile galvanized steel complete with integral gutters. The roof structure has an evenly distributed load capacity of 100 kg/m².


No electric wiring and equipment fitted. The unit is designed to have a surface mounted electrical installation.

Optional electric pack available.


The floor consists of a steel structure reinforced to satisfy bearing capacity and rigidity requirements. Flooring is fixed on top of the bearing structure composing of 12mm Cement particle board on which 2 mm thick PVC linoleum covering is laid over. (Flash point B1 – difficult to burn, smoke density Q1).

Chassis supporting frames and structure are manufactured from 3mm cold formed galvanized steel profiles . Vertical profiles are 1.5 & 2mm cold formed powder coated black steel profiles. The chassis can be split into five parts if  required. No insulation in chassis.

Structure has 250 kg/m² evenly distributed load capacity. Deflection is L/300 when placed directly onto level ground.


Apertures are cold formed powder coated 1.23 mm galvanized steel. The door is 0.6 mm powder coated galvanized flat steel formed into a sandwich panel with 50mm honey comb insulation c/w with all door furniture and euro cylinder lock.

Windows: uPVC double glazed window with vacuum sealed unit (4+10.5+4), inward opening with locking handle. 805 x 1135mm. Fly screens are available.


All nuts, bolts, and interconnecting trim are included in the package. To stack/link you will require additional add-on ‘kits’ that are available from your dealer.


Expandacom can be extended side to side or end to end by using the special linking kit. Units can be stacked by using the stacking kit. Both items are available separately.


When double stacking, the units need to be pre-assembled, prior to being craned or forklifted into position


Click on image to view larger size

6m Expandacom Technical Drawing
6m Expandacom Technical Drawing


All components of the Expandacom flat pack office container are packed to ensure that they are not damaged during transportation, loading and unloading under normal circumstances. The smallest transportation cube is achieved in this packing process.  Flatpacked dimensions 2,425mm x 6,240mm x 510mm, 1,286kg.


All components are replaceable. Additional window and door panels can be added to the original structure at any time.

Due to our continuous product development programme we reserve the right to change the specification without prior notice.

Expandacom is not designed to comply with U.K Building Regulations approval.

Uses for ExpandaCom Flat-Pack Modular Building:

The unique design and construction of the ExpandCom flat pack modular building offers maximum flexibility. Each unit is robust and fully insulated yet lightweight enough to be manoeuvred by hand onto even the most challenging site. The are the ideal solution for many industries and users, including:

  • Flat pack site office
  • Construction sites / building sites with limited or restricted access
  • Gatehouses
  • Offices below ground level
  • Schools / colleges that require temporary office space
  • Offices in retail parks and industrial estates
  • Local Authorities
  • Outdoor attractions
  • Showground and even organisers.

Ideal for use in restricted city centre locations – London, Birmingham, Cardiff, Manchester, Glasgow etc.

Flat packed units are delivered as part of a shared load on a 11m long rigid body truck with a crane arm so that it can self offload alongside the vehicle. Other delivery options may be available at additional cost.

Finance options available, subject to status.

Assembly service  available in some areas

The Expandacom is a genuine Expanda-range product.


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